General Motors is planning make a $450-million investment at its Detroit-Hamtramck Assembly Plant and a battery assembly facility in Brownstown Township to produce the next generation Chevrolet Volt, according to a report by The Detroit News. The investment is seen to result to the addition of a second shift at the site and the creation of 1,400 jobs, the daily said, citing unnamed sources.

GM spokeswoman Katie McBride said the carmaker is planning to hold a news event at the Associated Press Association set Tueday. Detroit Mayor Mike Duggan and Michigan Gov. Rick Snyder were among the invited guests at the event. Sales of the Volt have been slumping almost four years since its introduction.

In the first quarter of 2014, GM posted 15-percent drop in Volt sales in the United States to 3,606. The Detroit-Hamtramck site, which employs about 1,600 workers on a single shift, is the only facility the produces the Volt plug-in hybrid.

The battery assembly plant is located just 30 miles south of the Detroit-Hamtramck site, employing around 100 people.

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